Solve this application problem USING A1 GEBRA A motorist dro

Solve this application problem USING A1 GEBRA. A motorist drove 150 miles on country roads before driving 50 miles on mountain roads. The rate of speed on the country roods was three times the rate on mountain roads. The time spent traveling the 200 miles Was 5 hours. FINI) THE RATE OF THE MOTORIST ON COUNTRY ROADS. [Make the answer very clear] 65 mph 60 mph 55 mph. 40 mph 20 mph Solve this application problem USING ALGEBRA It takes Burt three times as long as Phuong to set up a new alarm system Together they can set it up in 90 minutes HOW IONG WOULD IT TAKE PHONG to set up the alarm system by himself? [Wake the answer very dear] 120 minutes 140 minutes 270 minutes 180 minutes 150 minutes.

Solution

Dear Student Thank you for using Chegg !! Distance trvelled on plain road = 150 miles Distance trvelled on mountain road = 50 miles Let speed of train on mountain road be = x miles/hr Therefore speed of train on plain road be = 3x miles/hr Total time taken in journey = 5 hours Formula = Time = Distance / Speed Total Time (Given 5 hrs) = 150/3x + 50/x = 100/x x = 20 miles /hr Hence speed of train on mountain road is 20 miles/hr Further speed of train on plain road is 60 miles/hr As per Chegg policies an expert can answer only 1 question at a time.